Rails 'can't quote array' on query

Question

I'm trying to make a general query to my navbar that will check if a record containing any of the given values in any of it's fields can be found.

This is the query in my model:

def self.basic_search(*keywords)
  where("specialties %% ARRAY[:k] or treatments && ARRAY[:k]::varchar[] or
  neighborhood = ANY(ARRAY[:k]) or name ~ ANY(ARRAY[:k])", k: keywords)
end

And in my controller I'm passing the keywords.split(' ') arguments to this function.

I'm getting an TypeError in my controller that states 'can't quote Array'.

How would I make this query?

I tried change my arrays to match ARRAY[:k]::varchar[] following the Active Record and PostgreSQL - Ruby on Rails Guide but it didn't seem to work.